hi this is my queries
{"$push": {f"avg_under_water": {"$avg": f"$event_data.under_water"},
f"$event_data.count": f"$event_data.under_water"}}
and i get error of Unrecognized expression , because f"$event_data.count" ,
why i cannot evaluate two value (count ,under water) and put it in the dict ?
what is the right way to do this ?
thanks very much